Board-end matching and sawing machine



April 28, 1931. J. E. KALGREN ND MATCHING AND SAWING MACHINE BOARD E l0 Sheets-Shee'l'l 1 Filed Aug. l8 1930 APril 28, 1931. J'. E. KALGREN v 1,803,020

. BOARD END MATCHING AND SAWING MACHINE Filed Aug. 18- 1930 l0 Sheets-Sheet 2 28, 1931. J, E, KALGREN 1,803,020

BOARD END MATCHING AND SAWING MCHINE Filed Aug. 18 1950 1o Sheets-smeet 3 April 2s, 1931.

J. E. KALGREN BOARD END MATCHING AND SAWING MACHINE Filed Aug. 18, 1930 lO Sheets-Sheet 4 April 28, 1931.

J. E. KALGREN BOARD END MATCHING AND SAWNG MACHINE Filed Aug. 1a. 1930 l0 Sheets-Sheet 5 Apri 28, 1931. J. E. KAL'GRN .BOARD END MATCHING AND SAWING MACHINE Filed'. 18- v1930 10 Sheets-Sheet 7 April 28 1931- I J. E. KALsRl-:N 1,803,020

vBOARD END MATCHING AND SAWING MACHINE Filea Aug.. 1e. 195o 1o sheets-sheet 8 April 28, l931- J. E.' KUALGREN 1,803,020

BOARD END MATCHING AND SAWING MACHINE Filed Aug. 18, 1930 10 Sheets-Sheet 9 m J0@ Eile/qm2? I April 28, 1931. J. E. KALGREN BOARD END MATCHING AND SAWING MACHINE I Filed Aug. 18, 193.0A lo'sheetS-sheet 10 Patented Apr. 28, 1931 i Uurro'rss `.IOHN E. KALGREN, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO in. CLARK COMPANY,

or MINNEAPOLIS., MINNESOTA, n CORPORATION on MINNESOTA .l

' BoARnaNn MAToniNe ANIS srewING-IMCTIINE' Application filed August 18,` 1936;k Serial No. 475,874.

My present invention has for its object to provide a highly reflicientmachine for use in the manufacture of composite lumber of predetermined length and made up of a plurality of end matched short boards of different lengths, 'the joints of which are glued together.

These composite pieces AOf lumber as they come from the machine may be run through In the accompanying drawings, `which 20 illustrate the Invention, like characters Ind1- cate like parts throughout the several views.

Referring to the drawings; Fig. 1 is a plan view of the board end matching and sawing machine;

Fig. 2 is a front elevation of the same; VFigq isa fragmentary detail view with some parts sectioned on the line 3 3 of Fig. 1 Fig. 4 is a view partly in elevation and partly in section taken on'the line 4 4 of 'f Fig. 1,on an enlarged scale;

Fig. 5 is a view corresponding to Fig. 4 but showing a different adjust-ment of the machine;

Figs. 6 and 7 are fragmentary detail views 'Tb-J partly in elevation and partly inl section 'taken on the lines 6-6 and 7-7 of Figs. 2

and 1, respectively, on an enlarged scale;

Fig. 8 is a fragmentary detail view with some parts sectioned on the line 8-8 -of Fig. i@ l, on an enlarged scale; j Y

Fig. 9 is a view corresponding to Fig. 8 but showing a different adjustment of the machine; V

Fig. 10 is a plan View 'of the sawing unit of the machine, on an enlarged scale;

Fig. 11 is aview corresponding to Fig. 10, v

but showing a different adjustment of the machine, on an enlarged scale;

Fig. 12 is a View principally in section 50 taken on the line 12-12 of Fig. 10;

y.ra'rsrn vorsice l* *.Fig.` 13 is a view principally in section i takenon the line l13--1'3 of Fig. 11;

Fig.` 14 is .a view principally` in section taken on the irregular line 14414 of Fig. 10; Fig. 15 is a vview principally in section takenon the irregular 4line 15--15 of Fig. 11;

Fig. 16 is a perspective view of the cam mechanism ofthe sawing unit;

- Fig. v17 is a view corresponding to Fig. 16 with som-e parts removed;

. Fig. '18 is a'fragmentary V*front elevation of the `trip mechanism of the sawing unit, on an enlarged scale ;v Y

Fig. 19 is afragmentary detail view in section taken on'theline 19,-19 of Fig. 18;

Fig. 20 i-s a view corresponding to` Fig. 18 but showing a different adjustment of the machine ;A ,Y

Fig. 21V is a perspective view of one of the iinishedpieces of composite rlumber 'as received from the machine; and

F ig.'22 is a fragmentary detail view in sec- .tion taken on the line 22-22 of Fig. 21, on an enlarged scale.

The numeral 23 indicatesa long, narrow base, 1n the form of an Inverted channelbar,

supported byy legs 24-at a convenient height.

At the receiving end of ,the machine is a work feeding unit' andv forward thereoff is a work sawing unit.. i

' The work feeding unit includes a lower pair of idle feed rolls`25 and an upper pair of cooperating 4driven feed rolls 26, the former of which are journaled in bearings on'y a heavy casting 27 rigidly secured to .the base 23 and..

projects rearward thereof, see Figs. 1, 2 and 3.

sol

" The upper fee'drolls -26are'mounted in a pair of hoods 28 and their shafts 29 arejour naledin the front sides of theho'ods 28 and in long sleeve-like bearingsV 30 formed VHwith the rear sides of said hoods. the hoods 28 and their bearings 30 are front and r-ear pairs of hinged lugs 31 connected by a fixed shaft 32 mounted,fintermediate of its ends, in a bearing 33 onV the casting 27.

The hinged hoods 28 and bearings 30'support the upper,v feed rolls 26 for radial movements "in respect to the idle feed rolls 25. Theseupper feed rolls 26 are yieldingly and independently pressed toward the idle feed Formed with rolls by coiled springs 34 that encircle eyebolts pivoted to lugs on the front ofthe hoods 28, intermediate of their ends, loosely work Vtlnough apertures in an overlying bracket 36 rigidly secured to the bearing 33, at the top thereof, and having nuts 37 which normally engage Lthe bracket 36 and vlimit the movements of the upper feed rolls 26 toward the lower feed rolls 25. y

`The'upper feed rolls 26 are simultaneously driven in the direction of the arrows indicated in Fig. 8 from an electric motor 38 the baseof which is rigidly secured to a motor support 39 in the form of a rear extension on the casting 27. The driving connections from the motor 38 includes a friction clutch 40 that is normally released. This clutch 40 is mounted on a shaft 41 ourn aled in bearings 42 on a support 43 rigidly secured to the casting 27 and forms a rear extension thereof.

.The driving member of the clutch 40" is loose-on the shaft 41 and has a relatively large pulley 44 aligned with arelatively small pulley 545 on the shaft of the motor 39 and over which pulleys a belt 46 runs. The driven. member 'of the clutch 40 is keyed to the'shaft 4l with freedom for axial sliding movement into and out of engagement with the driving member of said clutch. Axial movement of the driving member of the clutch 40, away from the driven member thereof is prevented, when the clutch is set, by the engagement of the hub of the pulley 44 with the rear bearing 42.

Cn the outer face of the driven member of -the clutch 40 is a ship-per collar'47 having an upright shipper lever 48 pivoted at its lower end to the support 43 and operated by a horizontal shift bar 49. One end of the shift bar 49 is pivoted to the upper end of the shipper lever 48 and its other Vend portion is slidably mounted ina long bearing 50 on the casting 27. The driven member of the clutch 40 is normally Vand yieldingly yheld released by a coiled i spring v51 mounted in a pocket 52 in the bearing 50. This spring 5l is compressed between the bottom ofthe pocket 52 anda washer and a nut 53 on one endof a rod 54 which extends 'parallel to'the'shift `bar 49, axially through Vsaid spring, a hole in the bottom of the pocket 52'and a lU-shaped anchor strap 55 on Vsaid vshift bar.` The end of the rod54 which extends through the strap 55 is'screw-threaded and has a nut 56 applied thereto thatV connects the. rod 54 to the bar 49 against the action of :the spring 51.

Y of different lengths that are endwise matched,

glued together and sawed into pieces of lumber B of a given length one of which is shown in Fig. 21. i

' Prior to the feeding of theboards A to the machineone end of each thereof is cut to form f therein two laterally spaced tongues C and the other end thereof is cut to form therein two laterally spaced grooves D. These tongues C and grooves D have a tapered tit and are formed in any well known manner, see Fig. 22. Y

The pieces of -boards A are assembled and fed to the feed rolls 25 and 26 on a long narrow work table 61 rigidly securedtoy the face of the casting 27. This work table 61 extends considerably forward of the feed rolls 25 and 26 and rearward thereof and has aperture 62 in which the lower feed rolls 25 Vwork with their uppermost surfaces slightly above the top of said table tohold the work for free movement thereover, see Figs. 8 and 9. Rigidly secured to the top of the table 6l is a long` guide rail 63 4against which the pieces of boards A are positioned to longitudinally align the same as they are successively 'connected.

The first board A placed on the feed table 61 is fed to the feed rolls 25 and 26 by hand with its tongue-equipped end toward said feed rolls. The other boards Aare successively placed on the feed table 61, in the same order as the first board A, with their inner longitudinal edges against the guide rail 63. Prior to placing the boards A on the feed table 61 their tongues C are dipped in glue to form a glue jointE between the connected ends of said boards. At-the time a board A is manually placed on the feed table 6l it is given an endwise movement toward the feed rolls 25 and 26 and guided by the rail 63 to force its Y tongues C intothe `grooves D of the previously positioned board A, which is between the feed rolls 25 and 26, to connect said boards. This vmovement of the tongues C into the grooves D spreads the glue evenly therebetween and against the abutting ends of said boards.

Referring now to the automatic means for operating the shift bar 49, against the tension of the spring 51, for settingthe clutch 40 to operate the feedy rolls 26 and permit said @luth t0Y release under the action 0f the lio spring 51 to lstop the driving connections for said rolls, this automatic means includes a cani roller64 that works in a spiral cam chair nel 65 vin a segmental cani block 66 rigidly secured to the rear end ofa rock-shaft 67 which extends horizontally and parallel to the axis of the feed rolls and 26. The rock-shaft 67 is journaled, intermediate of its ends, in a .bearing 68 on the casting 27 and apair of collars 69 on said shaft holds the same against endwise movement in the bearing 68.

ARigidly secured to the front end `of the shaft 67, which overlies the feed table 61 and Yto engage the shift bar 49, as an abutment, to

limit the extreme oscillatory movements of the arm 70.

The rst board A placed on the feed table 61 and fed by hand to the feed rolls 25 and 26 engages the'arm 70, swings the same upward toward said rolls to permit the board A to pass thereunder and causes the arm 70 to ride on said board under the tension of the spring 51, see Figs. 4 and 8. rFhis movenient of the arm 70, by the board A, sets the clutch 40 to operate the feed rolls 26through the connections just described and feed the composite lumber towa rdy the rear of the machine. As long as boards A are successively connected to the forwardly traveling piece of composite lumber the'arm 7 0 will ride thereon and hold the clutch 40 set.

In casethe manufacture of composite lumber B is interrupted by not Vconnecting' a board A to the Yrear end ofthe lumber B said lumber will pass from under the arm 70 l and release the same; At'the time the arm 7() is thus released ,the tensioned spring 51, acting on the shift bar 19, will, through the connections operated thereby, swing the arm 70 downward in the path of movement of 4the composite lumber B on the feed table 61 and also release the clutch i0 to stop the feed rolls 26, and hence, the feeding movement of the composite lumber B before its rear end reaches the first set of feed rolls 25 and 26.

The object of automatically releasing the clutch 40, to stop the feeding of the composite lumber B before its rear end reaches the first pair of feed rolls 25 and 26, is to prevent said rolls from crushing the rear end of said limiber at the grooves D vand also position said rear end of the composite lumber B where a board A may be connected thereto before Yreaching said feed rolls when the manufacture of composite lumber is resumed.

` lTo instantly stop the'feeding of the com'- vposite lumber B, at the time the clutch 10- isV released, under the momentum thereof and that rofthe feed rolls 25 and 26, there is provided a retarding device which acts directly `onsaid lumber after the samehas passed from between said feed rolls. This retarding device, as shown, includes a yielding friction yshoe 73 which directly rests on the-composite lumber B and presses the same onto the feed table 61.

The shoe 73 has fourfupstandingscrew- .c

studs .74, at its corners, which 'loosely extend through holes in anvoverlying `bracket 75 rigidly vsecured to the casting 27, see Fig.y7. Pairs of nuts 76 applied to the upper ends of the screw-studs '74 Voverlie `the bracket 7 5 e for engagement therewith to limit the move# ment of said shoe toward the feed table 61. Interposed between the shoe 7 Band the bracket 75 isa pressure Pplate 77 having holes through Whichthe screw-studs 74 loosely ex tend. Also interposed between the shoe 7 3 and pressure plate 77 are four yielding meinbers 78 of rubber or any .other suitable Inaterial. These members 78 are'positioned at .the corners of the shoe 73 and have holes, Y through which the screw-studs 74 project and hold said members in position. 'A The members 78 areheld undera variable compression with the'nuts 76 engaging the bracket 75, as a base of resistance for the,A shoe 73, by a long set-A,

screw 79 lthat has screw-threaded engagement with the bracket 75 andimpin ges against the pressure plate 77 at the center thereof. The' normal position of the shoe 7 3 above the feed table 61 is slightly less than the thickness will be slightly raised.-and hence, the ynuts of the composite lumber B so that said shoe'i105 1 76 from the bracket 75'by-the feeding of the composite lumber B thereunderto compress the members 7 8 and cause the same to en*M gage the composite lumber B with the desired tension.

'.Referring now in detail to the sawing unit,

which includes a circular saw 80 that is mounted on the shaftv of an electric motor81 and which shaft extends parallel to the feed table 61 and is spaced directly thereabove. The motor 81 is rigidly secured to and forms an extension of the front arm of a horizontal lever 82that extends transversely of said motor. This lever 82 is pivoted, intermediate of its ends, to a pair of bearings 83 on a carriage 8%' and which lever, at its pivot and connection with the motor 81, is very wide and securely holds the saw 8O against angular .movements in the plane thereof. u

raised by a iong coiled spring 85, see Figlll, and by reference to Fig. 11, itwill be noted that the'saw 81 is just beyond the rear'end of the feed table 6l so as to Clear Said, table r` Nermally the saw 80 is yieldingly heldL when the saw 81 is moved downward for sawing action, as shown in Fig. 15. Thev spring 85 encircles a long upright stem 86 the lower end of which is rigidly secured to Vthe carriage 84, extends loosely through an aperture in the rear arm of the lever 82 and is `compressed between a spring seat 87 and a spring cap 88.l The stem 86 extends loosely through axial holes in the spring seat 87 and spring cap 88 and which spring seat 87 loosely rests on the lever 82 and the spring cap 88 engages a nut 89 on tlie'upper end of said stem which affords an abutment for the spring 85 that is adjustable to vary the tension'of said spring. 1

Normally the spring 85 holds the, lever 82 in a position in which the saw 80 is raised and its rear armV rests on a yielding buffer 90. This buder 90, as shown, is in the form of a block of rubber held betweena pair of washers and which block and washers have axial holes through which the stem 86 extends. A pair of nuts having screw-threaded engagement with the stem 86 affords an adjustable support 91 for the buffer 90. A

The carriage 84, as shown, is in the form of an invertedchannel bar which extends longitudinally rearward of the feed table 61 with its upper face in the plane of the top of said table. Said carriage 84 is mounted `for reeiprocatory movement on a pair of rails arms and rollers, by their contact with the rails 92, hold the carriage 84 against movement in all directions except straight lineL travel on the rails 92.

The carriage 84 is yieldingly held in normal position, in which it is closely positioned to the vrear end of the feed tablcv61, to return to normal position by a long coiled spring 95 and a cooperating horizontal rod 96 which said spring encircles.

Said rod 96 is below the base 23 and itsrear end is connectedby a horizontal pivot, to the lower end of a depending arm 97 rigidly secured to the carriage 84- and projects through a longitudinal slot inthe base 28,*see Figs. 14-and 15. The rod 96 loosely extends through Va fixed angle support 98, on the under side work, a cam roller 101 is journaled on the rear end of said lever for cooperation with a cam 102. This cam 102, Awhich 1s relatively fixed, is rigidly secured to, a horizontal slide 10B that loosely rests onL a raised bed 104" rigidly secured to afbraclret105 which, in turn, is rigidly secured to the base 23 at the back thereof. Y

r1`he slide 103 has a compound movement on the'bed 104, that is'parallel to and transversely of the direction of travel of the carriage 84, by a pair of depending shouldered cam studs 106 on the under side of said slide and which studs extend into cam slots 107 in the bed`104. Nuts and washers 108 applied to the lower ends of the cam studs 106 engage the underside of the bed 104 and hold the slide 103 against lifting movement therefrom. The purpose of the slide 103 is to position the cam 102 in the path of movement of the cam roller 101 during the travel of the carriage 84 away from the feed table 61 and to move the same laterally out of said path during the return movement of the carriage 84.

A coiled spring 109 and cooperating hori- Zontal rod 110, which said spring encircles, yieldingly and normally holds the slide 103 with its cam 102 in the path of movement of the cam roller 101. One end ofthe rod 110 is pivotally connected to the lower end of one of the cam studs 106, extends parallel to the directionl of travel of the carriage 84 and through a hole in the rea-r end of the bed 104. On the outer end of the rod 110 ,is a nut and washer 111 and the spring 109 is compressed between said nut and washer and the adjacent endof the bed 104,

The rear end of the cam 102 is perpendicular to the slide 108 and affords an abutment 112 for the cam roller 101. Said cam roller 101, during the travel of the carriage 84 in the direction of the movement of the composite lumber in the machine, rides upward on the cam 102 and operates the lever 82 to feed the saw 80 to said lumber and cut the same in predetermined lengths. At the completion of this cutting action of the saw -80 the cam roller 101 passes over the cam 102 andpdrops, under the action of the compressed spring 85 on the lever 82, back of the abutment 112. This movement of the lever 82 rcturns the saw 80 to normal position. The

cam roller 101, during the initial return movement of the carriage 84, under the action of sion by said carriage during its travel toward vthe rear end of the machine, engages the abutment 112 and moves the slide 103 with the carriage 84. During this movementof the slide 103 with the carriage 84-the cam slots 107 acting on the Acam studs 106 move the slide 103 laterallyv away from the carriage 84 and the cam 102 out of the path of movement of the Cam roller 101 and permit said,

roller to pass the cam 102. After thecam roller 101 has passed the cam 102 the spring 109 returns the slide 103 and its cam 102 ,toA

` lineal travel7 there is provided a connector lever 115.

for securing thev carriage 84 tothe lumber B to be Amoved thereby. This connectoris in the form of a Afriction clamp that 4is auto` matically applied to the lumber B and released therefrom. This friction clamp includes a friction block 113 carried by a head 114 which is adjustably and detachably appliedto the outer or front arm of a lever 115 and pivoted intermediate of its ends to a fixedY bearing 116 on the carriage 84,see Figs. 12 and 13.` i .Y

The head 114 includes an upper section and a lower section connected by a horizontal pivot which permits saidlower Ysection to swing transversely of the carriage 84. Said upper section of the head 114. has a seat through which the respectivearm of the lever extends. A set-screw 117 in the upper section of the head 114 impinges against the lever 115and 4adjustably and detachably secures the head 114 thereto; The block 113 is secured byscrews 118, atits four corners, to the lower section of the head 114. Elastic members 119 of rubber or other suitable material are interposed between the block 113 and the head 114 and held in place bythe screws 118 which extend through holes therein. These members 119 permit a slight yielding action yof the block 113 in respect kto the head` 114 Awhen appliedto the lumber B.

rlhe clamp is yieldingly held raised by a coiled spring k120 which encircles 4a long bolt 121 the lower end of which is screwed into the bearing 116 and loosely extends through a large hole inthe rearor inner arm kof the The lever 115 extends parallel to the lever 82 and has a camroller 122 journaled on the rear arm of said'lever. Cooperating with the cam roller` 122 is a relatively7 fixed cam plate 123 on a slide`124 mounted on a bed 125 in a plane parallel .to

the bed 104. The bed 125is rigidly securedv to the bracket 105 and supports the slide 124 in a planebelow the slide 103. A pair of depending cam studs 126 onthe slide'124 extend into cam slots 127 in the bed 125 which are parallel to the cam slots 107'and impart a compound movementv to the slide 124that is like the compound movement imparted to the slide 103 injrespect to the carriage84. Nuts 128 appliedv to the lower ends ofthe cam studs126 engage the bed 125 and hold the `slide 124 against lifting movement therefrom The slides 103 and 124 are loosely connect--k ed at their adjacent ends by' overlapping.

flanges 129 and 130, respectively, `and this connection ismade adjustable by a set-SorenT 131 having threaded` engagement vviththe flange 129 andimpinges against the ,flanee 130,.,see Fig. 16. lBy this connection the sli e 103 holds the slide124 in normal positionand returns thesame to normal position under. the

action of the spring 109 as Will presently api,

pear. An adjustable stop, in theforin of a Setscrew 132, having threaded engagement. with an upstandinglug 133 on 'the rear end of the bed 125,1is arranged to be engaged by the slide 124 andset the same in normal position, .This

stop `132. acting through the flanges 12.9.1211`1d i' 1301and the stop 131 also 103 in normal position.

j The loose *connection between rthe slides 103 and 124 permit independent movements positions the slide of sai-d slides transversely of the .direction of travel ofthe .carriage 84. Vhen` the slides -103'an`d 124 arefin normal positionsthe cani 102 in the path of movementfof the cam roller101 and the .cam 123in-the pathfof= movenientboffthe .cam roller 122.

Overlyingthe cam 123 and spaced theierear end thereof afords .anabutlnent 137.

The shaft 135 is yieldingly :held `with 'the' cam block 134 in normal position bya fixed post 138 on thekslidez124-and a coiled spring 139 whichencircles anfeye-bolt140 pivoted to saidpost for vertical swinging movement.

This shaft `135 is providedvvith a radialarm 141 theuprer eHdporaon-Of which/1S as..

ially offset in respect. to. -said shaftand prof vided with an eye .through which the bolt 140 loosely projects. The lspring 139.is .comfy pressed between .the far-m `141 and yaY nutA 142 ongthe outer end Vof the bolt140fand.yield-v ingly and normally.;y holds Q the. arm 141 pressed Aagainst the post 138,*.see Figs. 10.130. 13, inclusive. l 'f i Duri fg the linitial -n'iovemjent of .tliefcar-f riage 84,k toward the rear ofthe machine, the cam roller 122engagesl the oblique front end of the `cam plate 123,'rides'.upwardl thereon and Vclampsthe block 113 onto .the underly-4 ing vpiece of. composite lumber B., presses the same onto the carriage-841andcouples.said carriage thereto so that the saw 80 tranels with ,the lumber B. Y At .the time the cam roller 122nioves .onto 'the cam plate 123 .it .engages the cam 136 rand rocks the ycam block 134.01m'I of its path ofmovem'ent against the tension f llO ' 123 it also passes out of engagement with theV 120`lifts theV block 113 fromthe lumber B andstops the carriage 84. When the cam roller 122 passes rearward of the cam plate cam` block 134 which isinstantly vreturned by the spring 139 to norm al position in which itis in the path of movement ofthe cam roller 122 during the return movement of i the carriage 84.

During the initial movement of the carriage 84, by the lumber B vto which it is connected by the clamp just described, the'cam roller 101 engages the cam 102 and starts .thefeeding movement of the saw V80 to the lumber B. By the time the cam roller 101 passes out of engagement with the cam102 the saw 80 has sawed the lumber B in two and drops in front of the abutment 112 which i lifts said saw and returns thesame to normal position.V

While the carriage 84V is being moved by the lumber B, the spring 95 is beingplaced Vunder tension thereby and when the frictionv A clamp is released, bythe movement Vof the cam'roller 122 from the cam plate 123, said spring returns the carriage to normal position. During the initial return movement of the-carriage 84 the cam roller 101 engages the abutment 112 and moves the slide 103 therewith and at which time the cam'V slots 107 acting on the cam studs 106 moves said I slide laterally away4 from the carriage 84 and the cam 102 is carried thereby out of the path of movement of said-cam roller which ,35

passes the same. Y

At the time the cam roller 101 is moving the slide 103 withl the return of the carriage 84 the cam roller 122` engages the abutmentV Y c l137 and imparts a movement to the slide 124 46 l engagement with the cam roller 122 and permits saidcam roller to pass the same. During the passing of the cam block 134 by the cam roller '122, said roller `'acts as an abutment for thercam block 134 andholds the slide 124y against the action, of the spring 109 which'is transmitted' throughv lthe slide 103 and connection 129, 130 and 131 to :the

slide 124. After the cam lroller 101 has passed out of engagement with the Vcani 102 andthe cam/roller 122 out of engagement with the cam block 134 the spring 109'returns' the slides 103 and 124 to nomal positions. f U

` Referring now to mechanism for imparting vthe initialmovement to the carriage 84 which carries the cam roller 122 onto the cam slide 123 to operate the friction clamp and con'-l ne'ct the? carriage 84 to the lumber B for movement therewith under the action of the feed rolls -25 and 26.v The mechanism is in the nature of a trip which includes ahorizontal which project through a pair of horizontal ,Y

longitudinally spaced cam slots 147 in said bar. The cam studs 146 are rigidly secured to a work support 148, at the front face thereof, and are equipped with nuts 149 and cooperating washers which -hold the pull bar 143 on the cam studs 146 and against said front face of the work support 148. Said work support 148 is rigidly secured to the top of the base 23, projects forward thereof and its upper face is in the plane of the upper surface of the carriage 84 so that the lumber B as the same is moved endwise over said carriage passes over and onto said work support.

An abutment 149 associated with the pull bar 143 is normally in the path of movement of the lumber B and is arranged to be engaged and moved thereby to impart the initial movement to the carriage 84. This abut- Y ment 149 is in the form of a block on the upper or short end of an upright lever 150 pivoted intermediate of its ends to a bearing 151 rigidly secured to the pull bar 143 for swinging movement longitudinally thereof. The lever 150 holds the abutment 149 above the pull bar 143 in the path of movement of the lumber B on the work support 148.

It may be here stated that the pull bar 143, byits engagement with the cam studs 146 at the rear ends of the cam slots 147 affords a Y stop which limits the return movement of the carriage 84 under lthe action of the spring 95. This stopalways positions the saw 80 a predetermined distance from the abutment 149 which determines the length of the pieces to be cut from the lumber B by the saw. During the final return movement of thecarriage 84 the lower or long arm of the lever 150 engages an abutment 152, which projects out- `ward of the rear endV ofthe work support 148 to which it is 'rigidly secured, and tilts theplever 150 toward the front end of the machine to position the face of the abutment 149 towardthe end of the lumber B so that it inclines downwardand away from said end of the lumber B. The purpose of thus positioning the abutment'149 is to insure a better' holding` contact with the lumberl B when struck thereby and prevent said lumber from riding thereover. Furthermore, at the time of the impact delivered by the rear end of lthe lumber B'to the abutment 149 the lever 150 will move on its pivot, 'as well as bodily, with the pull bar 143 to cushion the blow and prevent separation of the abutment 149l and lumber B so that the pieces of lumber cut by the saw are always exactly the same length. The pivotal movement imparted to the lever 150 also Vchanges the position of the abutment 149so thaty the inclination of its operative face isijust the reverseY from that, as shown in Fig. 18, see Fig. 20,\so that vsaid abutment freely releases from the `engaged end of the lumber B as the pull bar 143 is caused to move downward by the cam slots 147. Y

The formation of the cam slots'147 is such that the first movement imparted to the pull bar 143, by the engagement of the moving lumber B with the abutment 149 is straight and the carriage 84 will be drawn by said bar a suficient distance to operate the friction clamp, as heretofore described, to connect the carriage 84 to the'moving lumber B. Further movement of the carriage 84 Willbe imparted thereto by the moving lumber B and during the first part thereof the oblique portions of the cam slots 147 will engage the cam studs 146 and move the pull bar i43 downward and release lthe abutmentv 149 from the engaged end ofthe lumber B. The remainder of the movement ofthe pull bar 143 will be stra-ight and at which time the saw 8O has been fed to the. work and out the thereby to stop the feed device, anda retard-f ingdevice for the'work as the same is acted on by the feed device.

2. In a machine of the class -described,a

work feed device, and means for operating the feed device including a triparranged to be held in position bythe work during its movement to the feed device and be released thereby to stop Vthe feed device before the rear endv portion of the `work is acted on by the feed device.

.8. In a machine of the class described, a work feed device, a work table on which matched pieces of boards are successively connected as they are moved toward the feed device, and means for operating the feed device including a trip arranged to be held in position by the connected pieces of boards and on the work table and be released thereby, in case a piece of board is not connected to the last piece of board passingthe trip.

4. In a machine of the class described, a work feed device, a work table on lwhich Vmatched pieces of boards are successively sei connected as they are moved toward the feed device, and means for operating the feed device including a trip arranged to be held in position by the connected pieces of boards and on the Work table and be released thereby, in case a piece 0f board is not connected to the last piece of board passing the trip to stop the feed device before the matchediend of said last piece of board is engagedby the feed device.

5. In a machine of the class described, a

pair of cooperating feed. rolls, ymeans yfor driving one vof the feed rolls including ai clutch under strain to release, and means for setting-the clutch including ar cam having a lever arranged to be actuated by a piece of work as thesame is moved to the feed device and ride thereon until released by the work passing from thereunder. f 6. In a machine ofthe class described, a` lower pair of radially spaced idle feed rolls, a pair ofudriven upper feed rollscooperating with the idle rolls, said driven rollsbeing `iournaled in bearings mounted to swing about a common axis and spring-pressed towardthe ridle rolls, a gear on each of the driven rolls, a gear meshing with the gears on the/*driven rolls and mounted to turn aboutsaid common aXismeans.for driving the lastv noted gear including a clutch under strain to release, a work table on which work is movedy to ythe feed rolls, andy means for setting the clutch including a triparranged to be held by apiece of work on the table as the same is moved to thefeed rolls and be released by the work as the same passes thereunder. .f

7.In a machine of the class described,A a work feed device, Va reciprocatory carriage, a cutter on the carriage, `means o-perated by. a piece of work as the'same is moved by the feed device for imparting the initial movement V*tothe carriage, means actuated by Vthe carriage during its initial ymovement for causing 4said carriage to-move with the work for a predetermined distance and thenrelease the same, and means actuated by the llast noted ymovement of the carriage for causing the cutter to act upon the .work during its movement by the worin 8. The' structure defined inclaim 7 which furtherfincludesmeansr for returning the carriage to normal-position. y

9.111 amachme of the class described, a

work feed device, a lreciprocatory carriage,

a" cutter onthecarriage,means operated by the movement of the lworlrby the feed device for imparting` the yinitialmovement to the carriage, means actuat'edby the initial movement ofl thevcarriage-to cause the carriage to move a predetermined distance with the work and then release the same, means for operatingthe cutter during the'l'ast, noted movement of thecarriage, and a spring arranged:

toy be placed under tension by the movement of the carriage by the work and for returnling the carriage to normal position when releasedin respect to the work.

l0. In a machine of the class described, a work feed/device, a reciprocatory carriage overwhich the Work is moved by the feed de'- vice, a cutter on the carriage, means operated by the movement of the work by the feed device for imparting the initial movement to the carriage, a normally released clamp, means operated by the initial movement of the carriage for pressing the clamp onto the Work onto the carriage and cause said icarriage to move With the Work, means operated by the last noted movement of the carriage for releasing the clamp after a predetermined movement of the carriage, and means for operating the cutter during the last noted movement of the carriage.

ll. In a machine of the class described, ai

Work feed device, a reciprocatory carriage, a cutter on the carriage, a trip intermittently operated by theV movement of the Work by the feed device for imparting the initial yInovement to the carriage and then release the same, means operated by the initial movement of the carriage for causing the carriage to move a predetermined distance With the Work and then releasel the same, and means for operating the cutter during the lastnoted movement of the carriage with the Work.y

l2. In a' machine of the class described, a Work feed device, a reciprocatory carriage, a cutter' on the carriage, a trip intermittently operated by the movement of the Work bythe feed device for imparting the initial movement to the carriage and then release the same, a. normally released `clamp on the carriage operable to engage the vWork and cause the carriage to move therewith, a cam arranged to operate the clamp during the initial movement of the carriagey and then release the same Vafter a predetermined'movement of the carriage with the Work, and means for-.operating the cutter during the last notedl movement of the carriage vvith the Work.

' 13.. In a machine of the class described, a Work feed device, a reciprocatory carriage, a cutter onl thecarriage, a .pull bar movably mounted on the carriage and Vhaving anabutment arranged to be engaged by the Work during its movement by the feed device yto impart the initial movementto the carriage, a cam for operating the pull bar torelease its abutment from the Work after a predetermined initial movement of the carriage,

means operated by the initial movement 'of Y the carriage for causingthe-carriage to move a predetermined distance With the Work and then release the same', and, means for oper-V ating the cutter during the `last noted movement of the carriage bythe Work.

14.*Ina machine of the class described, a Work Vfeed device, a: reciprocatory carriage, a cutter on'the carriage, a trip intermittently operated by the .movement ofthe Work by the, feed device for imparting the initial movement to the carriage and then release the same, 'a'lever pivoted intermediate of its ends to the carriageand-having on one end a clamping head, arranged to be ypressed'onto the Work for causing the carriage to move with the Work, and on its other end a cam roller, a cam arranged to be engaged by the cam roller during the initial movement of the carriage and opera-te the lever to press the clamping head onto the Work and then release the same, and means for operating the cutter during the Vlast noted movement of the carriage. f

15. In a machine of the class described, a Work feed device, a reciprocatory carriage, a motor driven cutter mounted on the carriage for movement to and from a cutting position, means for causing the carriage to intermittently move with the Work, and a cam for moving` the cutter into an operative position during the movement of the carriage with the work and then release the same.

16. In a machine of the class described, a. Work feed device, a reciprocatory carriage, a lever pivoted intermediate of its ends on the carriage, a motor-driven saw mounted on one end of the lever, a cam roller on the other end of the lever, yielding means under strain to hold the lever with the saW in an inoperative position, means for intermittently moving the carriage with the Work, and a cam arranged to be engaged by the cam roller during the movement of the carriage With the Work and operate the lever to move the savv into an operative position for action on the Work and then release the same.

.17. In a machine of the class described, a Work feed device, means for operating the feed. device including a trip-arranged to be held in position by the Work during move- .ment tothe -feed device and bereleased thereby to .stop the feed device, and a variable tension-retarding device for the Work as the Vsame is acted on by the feed device.

In testimony whereof I affix my signature.

` JOHN E. KALGREN. 

